Psychiatric Bulletin (2000) 24: 197. doi: 10.1192/pb.24.5.197-b
© 2000 The Royal College of Psychiatrists
Psychiatric Bulletin (2000) 24: 197
© 2000 The Royal College of Psychiatrists
Serotonin syndrome
Mark Ruddell, Clinical Research Fellow
Division of Psychiatry, University of Nottingham, Duncan Mac-Millan
House, Porchester Road, Nottingham NG 3 6AA
Sir Mir & Taylor (Psychiatric Bulletin, 23, 742-747) make an
error in their article on serotonin syndrome. They start their article by
stating that serotonin syndrome appears to be a new phenomenon; this is
untrue. Serotonin syndrome is well-known to be an element of the carcinoid
syndrome, a medical disorder characterised by high levels of circulating
catecholamines due to inappropriate secretion by a tumour, for example, of the
gut or adrenal medulla. This is not a drug side-effect.
The implications of this are potentially serious; a patient could present
with the symptoms described without having a drug-induced serotonin syndrome,
and the differential diagnosis is not discussed in this paper. The sections on
Causes of serotonin syndrome and Biochemical mechanism of
serotonin syndrome are, therefore, dangerously misleading. This could
result in missed diagnoses of carcinoid syndrome, or misattribution of
systemic serotonergic effects because other causes have not been
considered.